/*
 *  Copyright 2008-2010 NVIDIA Corporation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */


/*! \file reduce.h
 *  \brief Device implementations for reduce.
 */

#pragma once

#include <thrust/detail/device/dispatch/reduce.h>
#include <thrust/detail/device/generic/reduce_by_key.h>

#include <thrust/iterator/iterator_traits.h>

namespace thrust {
namespace detail {
namespace device {

template < typename InputIterator,
         typename OutputType,
         typename BinaryFunction >
OutputType reduce(InputIterator first,
                  InputIterator last,
                  OutputType init,
                  BinaryFunction binary_op) {
    // dispatch on space
    return thrust::detail::device::dispatch::reduce(first, last, init, binary_op,
            typename thrust::iterator_space<InputIterator>::type());
}

template < typename InputIterator1,
         typename InputIterator2,
         typename OutputIterator1,
         typename OutputIterator2,
         typename BinaryPredicate,
         typename BinaryFunction >
thrust::pair<OutputIterator1, OutputIterator2>
reduce_by_key(InputIterator1 keys_first,
              InputIterator1 keys_last,
              InputIterator2 values_first,
              OutputIterator1 keys_output,
              OutputIterator2 values_output,
              BinaryPredicate binary_pred,
              BinaryFunction binary_op) {
    // use generic path
    return thrust::detail::device::generic::reduce_by_key(keys_first, keys_last, values_first, keys_output, values_output, binary_pred, binary_op);
}

} // end namespace device
} // end namespace detail
} // end namespace thrust

